AK-47s are famed for their abilities to survive the elements, but in this case Destin of Smarter Every Day is doing more than just making things go boom while recording with a high-speed camera. He's looking into how firing the AK-47 through different mediums influences the speed at which the weapon operates. Thanks to having a camera that's capable of recording thousands of frames per second, he's able to accurately record and track just how fast the weapon fires and rechambers, both aboveground, and underwater.